Closing bag



Sept. 11, 1928. 4 1,683,771

P. GANGLER CLOSING BAG Filed Oct. 6, 1923 Patented Sept. 11, 1928.

UNITED STATES PATENT OFFICE.

PAUL GANGLER, OF ESSLINGEN, GERMANY, ASSIGNOR TO THE FIRM FR. EESSERMASCHINENFABRIK-AKTIENGESELLSCHAFT,

' MANY.

OF STUTTGART-CANNSTATT, GER- CLOSING BAG.

Application filed October 6, 1923,

My invention relates to a method of closing packages consisting of aninner bag adapted tocontain a pulverulent substance such as cocoa, andinserted in a carton or other protective envelope. It is an object of myinvention to provide a method which may be easily performed by simplemechani cal means in a simple and clean manner and provides anabsolutely dust-proof closure.

To this end, the new method essentially consists in flattening the emptyend of the inner bag which rojects from the envelope by spreading saidend, folding it in zigzag fashion by creasing it from opposite sides atsuperposed levels, forcing the central portion of the creasedend intothe outer envelope and folding the lateral portions of said creased enddown upon said central portion by closing the flaps of the outerenvelope. In this manner, in addition to the regular longitudinalcreases made in the closed end of the inner bag irregular transversecreaseswill form at the edges of said end, and this system ofintersecting creases closure and in makes a closure which is absolutelydustproof and practically airtight.

It has already been proposed to close filled bags by means of flapswhich are bent over from one side of the bag and pasted to its otherside, or by rolling up the pasted upper empty end of the bag. The formermethod, however, does not make a reliable the latter method air istrapped during the rolling up, so that the bag cannot be folded downfirmly on its contents and may even burst. It my method, on the otherhand, the system of intersecting folds provides an absolutely reliableclosure while allowing the air to escape during the folding operation. 4g

My method is performed without the assistance of an adhesive, which isundesirable as it may exert chemical or hygroscopic influence on thecontents of the bag and may soil the folding members.

- In the drawings affixed to this specification and forming art thereofthe closing of a package accor ing to my method is illustrateddiagrammatically by way of example in its several stages. Referring tothe drawings, Figs. 1, 2,

Serial No. 666,986, and in Germany October 12, 1922.

lustrates the creasing of the folds at their edges by forcing the foldedportion of the bag into its envelope.

More particularly Fig. 1 is an end elevation of an envelo e, forinstance a carton for cocoa or the li e, with a paper bag inserted,

Fig. 2 is a transverse section of the carton showing the upper .end ofits paper bag flattened by spreading,

Fig. '3 1s a longitudinal section corresponding to Fig. 2,

Figs. 4, 5 and 6 are sections similar to Fig. 2 illustrating the variousstages of the folding operation, and

Fig. 7 is a section similar to Fig. 3 showing the creasing-0f the foldedportion at both edges.

Referring now to the drawings, and first to Figs. 1, 2 and 3 a is thecarton or envelope with four flaps a, (1 ,11. and a. at its upper end inwhich is inserted a bag I), for instance of paper, the upper end I) ofwhich projects from the carton a. The bag I) is supposed to be filled asfar as the base of the flaps a etc. and is ready to be closed.

To this end spreaders 1 and 1 are inserted in the upper end I) of thebag. The

Fig. 2. The plates are moved in opposite directions as indicated by thearrows and this may be effected as described in mysaid copendingapplication, where oscillating and reciprocating motion is impartedtothe plates. The operation of compressing the end Z) may be performedduring or after the spreading operation illustratedin Fig. 3, or it maybe dispensed with altogether, according to the material of the bag I).

Referring now to Figs. i, 5 and 6,. the flattened end I) is inserted ina slot 23' between two jaws 23, 23 which may be applied v as describedin my said copending pressure on both sides of the flattened end I), asindicated in' application. The end b Is not firmly gripped by the jawsbut merely guided between t em. Plate-shaped folding members I, III, andV, II, IV'and VI now act on the lower portion of the end b just abovethe filled portion of the bag, the plates being alternately advancedfrom the left and from the right. Fig. 4

vanced in full lines, bending over the end 6 at its root and deflectinit horizontally. The next plate II is now a vanced from the right asshown in dotted lines in Fig. 4 and folds over the end 6 above the firstfold, flattening it down upon the folder I. Fig. 5 shows the similaraction of the folders III and IV which are advanced successively whilethe folders I and II remain in position, and Fig. 6 shows thecorresponding operation of the folders V and VI. The foldin operation isnow completed and the en 6' has been pulled out between the jaws 23, 23.

It will be understood that I am not limited to any definitemumber offolding members.

\Vhen the folding operation has been completed the jaws 23 are loweredinto the carton a as shown in Fig. 7, The jaws exert pressure on thecentral'portion of the folded-over end I) and, as the folded-over showsthe plate I adend is longer than the carton a as shown in Fig. 3, itsedges will be bent over and creased at the walls of the carton as shownat b and b in Fig. 7, and transverse creases are formed in the ends. Thecreased end is forced completely into the carton a by folding down theflaps a, a. All the flaps are then sealed or otherwise "secured.

I wish it to be understood that I do not desire to be limited to theexact details of construction shown and described for obviousmodifications will occur to a person skilled in the art.

The method of closing packages which consist of an inner bag, contentsand a. carton, comprising flattening the empty end of the inner bagwhich projects from the carton by spreading said end, folding it zigzagfashion by creasing it from opposite sides at superposed levels,beginning from the level of said contents and continuing upwardly,forcing the central portion of the creased end into said carton andfolding the lateral portions of said creased end down upon said centralportion by closing the flaps of said carton.

In testimony whereof I aflix my signature.

' PAUL GANGLER.

